Recovering prisoners around valley with money (12)
I believe the answer is:
convalescent
'recovering' is the definition.
(synonyms)
'prisoners around valley with money' is the wordplay.
I cannot quite see how this works, but
'around' could be 'o' (a round letter) and 'o' is found in the answer.
'valley' could be 'vale' (synonyms) and 'vale' is located in the answer.
'money' could be 'cent' (eg denomination of dollars) and 'cent' is located in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for convalescent that I've seen before include "One may be showing improvement" , "Novel accents (anag) -- gradually recovering health" , "getting back to normal" , "(Person) getting better" , "Person picking up" .)